diff options
Diffstat (limited to 'StdLib/Include/sys/callout.h')
| -rw-r--r-- | StdLib/Include/sys/callout.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/StdLib/Include/sys/callout.h b/StdLib/Include/sys/callout.h new file mode 100644 index 0000000000..b3768199fa --- /dev/null +++ b/StdLib/Include/sys/callout.h @@ -0,0 +1,131 @@ +/* $NetBSD: callout.h,v 1.22 2005/12/11 12:25:20 christos Exp $ */
+
+/*-
+ * Copyright (c) 2000, 2003 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
+ * NASA Ames Research Center.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the NetBSD
+ * Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Copyright (c) 2000-2001 Artur Grabowski <art@openbsd.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _SYS_CALLOUT_H_
+#define _SYS_CALLOUT_H_
+
+/*
+ * The following funkyness is to appease gcc3's strict aliasing.
+ */
+struct callout;
+struct callout_circq {
+ /* next element */
+ union {
+ struct callout *elem;
+ struct callout_circq *list;
+ } cq_next;
+ /* previous element */
+ union {
+ struct callout *elem;
+ struct callout_circq *list;
+ } cq_prev;
+};
+#define cq_next_e cq_next.elem
+#define cq_prev_e cq_prev.elem
+#define cq_next_l cq_next.list
+#define cq_prev_l cq_prev.list
+
+struct callout {
+ struct callout_circq c_list; /* linkage on queue */
+ void (*c_func)(void *); /* function to call */
+ void *c_arg; /* function argument */
+ int c_time; /* when callout fires */
+ int c_flags; /* state of this entry */
+};
+
+#define CALLOUT_PENDING 0x0002 /* callout is on the queue */
+#define CALLOUT_FIRED 0x0004 /* callout has fired */
+#define CALLOUT_INVOKING 0x0008 /* callout function is being invoked */
+
+#define CALLOUT_INITIALIZER_SETFUNC(func, arg) \
+ { {{NULL}, {NULL}}, func, arg, 0, 0 }
+
+#define CALLOUT_INITIALIZER CALLOUT_INITIALIZER_SETFUNC(NULL, NULL)
+
+#ifdef _KERNEL
+void callout_startup(void);
+void callout_init(struct callout *);
+void callout_setfunc(struct callout *, void (*)(void *), void *);
+void callout_reset(struct callout *, int, void (*)(void *), void *);
+void callout_schedule(struct callout *, int);
+void callout_stop(struct callout *);
+int callout_hardclock(void);
+
+#define callout_setfunc(c, f, a) \
+do { \
+ (c)->c_func = (f); \
+ (c)->c_arg = (a); \
+} while (/*CONSTCOND*/0)
+
+#define callout_pending(c) ((c)->c_flags & CALLOUT_PENDING)
+#define callout_expired(c) ((c)->c_flags & CALLOUT_FIRED)
+#define callout_active(c) ((c)->c_flags & (CALLOUT_PENDING|CALLOUT_FIRED))
+#define callout_invoking(c) ((c)->c_flags & CALLOUT_INVOKING)
+#define callout_ack(c) ((c)->c_flags &= ~CALLOUT_INVOKING)
+#endif /* _KERNEL */
+
+#endif /* !_SYS_CALLOUT_H_ */
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